From nobody Sat Oct 4 22:35:27 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CCF1F25C706 for ; Tue, 12 Aug 2025 13:10:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755004240; cv=none; b=cWeRbOJiGI+dIM1zlJnpA+1jt5cQOwUG1o8RHZ/KQvlq3TFVqqDYVnUMOBVw52B3YcSD/rFzNZcWXG5bS3pd7RsBo/fzOp548914wSWB9ahg0elJXJokr+MFXD/uJPouyiXdEFMcYKosTgSN6spWrVAZPiGyo8QnF+BzMj7Nnbc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755004240; c=relaxed/simple; bh=26ooarSgdO9PSAiMZ0O74U9w8cb5/o/4g4Q76W9o+n0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=WB6oxlXaHa+GEh2kYMSIwICTtsCcvt/0xNAncJ9WK6F/qeLE7Bm5fBJoUSMh6TMPasOhHhZoOHfZMVA5It1ZVuwKEvywPXbtM4BvfFbtBzTM0+DIBeU/QUfWW7oRXrOfTcPp7bZyz5oE0G6kroJXmiE36ur+nXKCYXXVbU6kr7o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=aZ3KaVOw; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="aZ3KaVOw" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1755004237; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=90kjOoDlgJxvROpKhCBaV42MFQEOcPlCS7aVoYrLf2Q=; b=aZ3KaVOwTJOy8HWVqLiui874CV75GU2SB5QtkibLAwESLtY1PmsomAa1H+vojBXAYn/ixh yFw5Ffe5hlRkRXpAHfzsAaJlnEWjiZO9IHdyGaZ8jUvlM0yyK03vDxhtPt2hBEHYL4vXy8 5oLTqCyxUude+lDHh5yVMLpU9PQcmhE= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-675-TQnxb7SJOn-5DJ0f1i7kgA-1; Tue, 12 Aug 2025 09:10:33 -0400 X-MC-Unique: TQnxb7SJOn-5DJ0f1i7kgA-1 X-Mimecast-MFC-AGG-ID: TQnxb7SJOn-5DJ0f1i7kgA_1755004227 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 5A40B1800291; Tue, 12 Aug 2025 13:10:27 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.156]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 7D1B71955F16; Tue, 12 Aug 2025 13:10:18 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: snovitoll@gmail.com, ryabinin.a.a@gmail.com, christophe.leroy@csgroup.eu, hca@linux.ibm.com, andreyknvl@gmail.com, akpm@linux-foundation.org, chenhuacai@loongson.cn, davidgow@google.com, glider@google.com, dvyukov@google.com, alexghiti@rivosinc.com, kasan-dev@googlegroups.com, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-um@lists.infradead.org, linux-kernel@vger.kernel.org, agordeev@linux.ibm.com, Baoquan He Subject: [PATCH 4/4] mm/kasan: remove kasan_arch_is_ready() Date: Tue, 12 Aug 2025 21:09:33 +0800 Message-ID: <20250812130933.71593-5-bhe@redhat.com> In-Reply-To: <20250812130933.71593-1-bhe@redhat.com> References: <20250812130933.71593-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Content-Type: text/plain; charset="utf-8" Now there's no any place where kasan_arch_is_ready() is needed, remove all its invocations. Signed-off-by: Baoquan He --- mm/kasan/common.c | 9 +++------ mm/kasan/generic.c | 9 --------- mm/kasan/kasan.h | 6 ------ mm/kasan/shadow.c | 18 ------------------ 4 files changed, 3 insertions(+), 39 deletions(-) diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 69a848f2a8aa..e48c1fd60edf 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -271,7 +271,7 @@ static inline void poison_slab_object(struct kmem_cache= *cache, void *object, bool __kasan_slab_pre_free(struct kmem_cache *cache, void *object, unsigned long ip) { - if (!kasan_arch_is_ready() || is_kfence_address(object)) + if (is_kfence_address(object)) return false; return check_slab_allocation(cache, object, ip); } @@ -279,7 +279,7 @@ bool __kasan_slab_pre_free(struct kmem_cache *cache, vo= id *object, bool __kasan_slab_free(struct kmem_cache *cache, void *object, bool init, bool still_accessible) { - if (!kasan_arch_is_ready() || is_kfence_address(object)) + if (is_kfence_address(object)) return false; =20 /* @@ -318,9 +318,6 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *= object, bool init, =20 static inline bool check_page_allocation(void *ptr, unsigned long ip) { - if (!kasan_arch_is_ready()) - return false; - if (ptr !=3D page_address(virt_to_head_page(ptr))) { kasan_report_invalid_free(ptr, ip, KASAN_REPORT_INVALID_FREE); return true; @@ -547,7 +544,7 @@ bool __kasan_mempool_poison_object(void *ptr, unsigned = long ip) return true; } =20 - if (is_kfence_address(ptr) || !kasan_arch_is_ready()) + if (is_kfence_address(ptr)) return true; =20 slab =3D folio_slab(folio); diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c index 8daea5892754..d513e3e2e136 100644 --- a/mm/kasan/generic.c +++ b/mm/kasan/generic.c @@ -168,9 +168,6 @@ static __always_inline bool check_region_inline(const v= oid *addr, if (!kasan_enabled()) return true; =20 - if (!kasan_arch_is_ready()) - return true; - if (unlikely(size =3D=3D 0)) return true; =20 @@ -196,9 +193,6 @@ bool kasan_byte_accessible(const void *addr) { s8 shadow_byte; =20 - if (!kasan_arch_is_ready()) - return true; - shadow_byte =3D READ_ONCE(*(s8 *)kasan_mem_to_shadow(addr)); =20 return shadow_byte >=3D 0 && shadow_byte < KASAN_GRANULE_SIZE; @@ -505,9 +499,6 @@ static void release_alloc_meta(struct kasan_alloc_meta = *meta) =20 static void release_free_meta(const void *object, struct kasan_free_meta *= meta) { - if (!kasan_arch_is_ready()) - return; - /* Check if free meta is valid. */ if (*(u8 *)kasan_mem_to_shadow(object) !=3D KASAN_SLAB_FREE_META) return; diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 129178be5e64..e0ffc16495d7 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -544,12 +544,6 @@ static inline void kasan_poison_last_granule(const voi= d *address, size_t size) { =20 #endif /* CONFIG_KASAN_GENERIC */ =20 -#ifndef kasan_arch_is_ready -static inline bool kasan_arch_is_ready(void) { return true; } -#elif !defined(CONFIG_KASAN_GENERIC) || !defined(CONFIG_KASAN_OUTLINE) -#error kasan_arch_is_ready only works in KASAN generic outline mode! -#endif - #if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST) =20 void kasan_kunit_test_suite_start(void); diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c index 637f2d02d2a3..d8b975282b22 100644 --- a/mm/kasan/shadow.c +++ b/mm/kasan/shadow.c @@ -128,9 +128,6 @@ void kasan_poison(const void *addr, size_t size, u8 val= ue, bool init) if (!kasan_enabled()) return; =20 - if (!kasan_arch_is_ready()) - return; - /* * Perform shadow offset calculation based on untagged address, as * some of the callers (e.g. kasan_poison_new_object) pass tagged @@ -156,9 +153,6 @@ void kasan_poison_last_granule(const void *addr, size_t= size) if (!kasan_enabled()) return; =20 - if (!kasan_arch_is_ready()) - return; - if (size & KASAN_GRANULE_MASK) { u8 *shadow =3D (u8 *)kasan_mem_to_shadow(addr + size); *shadow =3D size & KASAN_GRANULE_MASK; @@ -402,9 +396,6 @@ int kasan_populate_vmalloc(unsigned long addr, unsigned= long size) if (!kasan_enabled()) return 0; =20 - if (!kasan_arch_is_ready()) - return 0; - if (!is_vmalloc_or_module_addr((void *)addr)) return 0; =20 @@ -575,9 +566,6 @@ void kasan_release_vmalloc(unsigned long start, unsigne= d long end, if (!kasan_enabled()) return; =20 - if (!kasan_arch_is_ready()) - return; - region_start =3D ALIGN(start, KASAN_MEMORY_PER_SHADOW_PAGE); region_end =3D ALIGN_DOWN(end, KASAN_MEMORY_PER_SHADOW_PAGE); =20 @@ -626,9 +614,6 @@ void *__kasan_unpoison_vmalloc(const void *start, unsig= ned long size, * with setting memory tags, so the KASAN_VMALLOC_INIT flag is ignored. */ =20 - if (!kasan_arch_is_ready()) - return (void *)start; - if (!is_vmalloc_or_module_addr(start)) return (void *)start; =20 @@ -651,9 +636,6 @@ void *__kasan_unpoison_vmalloc(const void *start, unsig= ned long size, */ void __kasan_poison_vmalloc(const void *start, unsigned long size) { - if (!kasan_arch_is_ready()) - return; - if (!is_vmalloc_or_module_addr(start)) return; =20 --=20 2.41.0